Under the Truth in Lending Act, if your credit card is used without your authorization, you are only held liable for up to $50 per card. If you report the loss before the card is used, federal law says the card issuer cannot hold you responsible for any unauthorized charges.
If a thief uses your card before you report it missing, the most you will owe for unauthorized charges is $50. This is true even if a thief is able to use your credit card at an automated teller machine (ATM) to access your credit card account.
To minimize your liability, report the loss of your card as soon as possible. Most companies have toll-free numbers printed on their statements and 24-hour service to report lost or stolen cards.